Amusement devices: toys – Figure toy or accessory therefor – Having means for simulating personal toilet or medical...
Patent
1997-09-26
1998-12-01
Hafer, Robert A.
Amusement devices: toys
Figure toy or accessory therefor
Having means for simulating personal toilet or medical...
446394, A63H 344
Patent
active
058429050
ABSTRACT:
A simple, general purpose temporary dyeing process for coloring plastic or plastic fabric is disclosed. A colorless, but pH sensitive indicator solution is applied to a plastic material, such as the hair of a fashion doll, without changing the hair color. A developer solution of a specific pH range is subsequently applied to the doll hair, thereby causing the color of the hair to change. As the hair dries and the developer solution evaporates, the hair returns to its original color.
REFERENCES:
patent: 3382607 (1968-05-01), Ryan et al.
patent: 4276207 (1981-06-01), Lester et al.
patent: 5083967 (1992-01-01), Yokoe et al.
patent: 5346422 (1994-09-01), Bagrodia
Kan-Nan Chen
Kien-Wan Chiu
Kwan Chiu Keung
Lee James S. W.
C.J. Associates Ltd.
Carlson Jeffrey D.
Hafer Robert A.
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